Frequency conversion air conditioning inverter upper arm trigger and drive

"Three phase six take" trigger circuit of the upper arm three power tube circuit is three independent circuits, so to provide electric motor 12v 500w power supply switch power supply has three secondary windings. We analyze one of the circuit can know the working principle of the two remaining road. Upper arm circuit output phase voltage U work. Under the figure marked element of V and W phase for generator set spare parts the corresponding element, the output of the two groups after the voltage required for the operation of the V and W phase control signals. IC2 for CPU control light lotus root, make compressor circuit and main circuit isolation. CPU ac motor triggered by light lotus root IC2 drive signal, the output trigger signal to trigger the u and in IPM terminals u constitute a loop. Eu power tube unit circuit of acmotortrading.blogspot.com voltage access IPM as power supply, and terminal U make loop. The power supply circuit of the public side of U is U phase voltage variable frequency ac output.